Kayelyn is a distinctive girls' name in United States, ranking #9778 in 2008 with 12 recorded births. The name reached its all-time peak in 1999 with 14 births ranking #7031. Since 1996, the popularity has increased by 71.4%. In 2008, approximately 1 in every 157,560 girls born was named Kayelyn. RISING Recent data shows the name is currently rising.